diff --git a/.buildkite/downstream.yml b/.buildkite/downstream.yml
index f0a928c2..e635ca5e 100644
--- a/.buildkite/downstream.yml
+++ b/.buildkite/downstream.yml
@@ -8,7 +8,7 @@ steps:
   - label: "CUDA.jl"
     plugins:
       - JuliaCI/julia#v1:
-          version: "1.12"
+          version: "1.13"
       - JuliaCI/julia-coverage#v1:
           codecov: true
     command: |
@@ -42,7 +42,7 @@ steps:
   - label: "oneAPI.jl"
     plugins:
       - JuliaCI/julia#v1:
-          version: "1.12"
+          version: "1.13"
       - JuliaCI/julia-coverage#v1:
           codecov: true
     command: |
@@ -75,7 +75,7 @@ steps:
   - label: "AMDGPU.jl"
     plugins:
       - JuliaCI/julia#v1:
-          version: "1.12"
+          version: "1.13"
       - JuliaCI/julia-coverage#v1:
           codecov: true
     command: |
@@ -104,7 +104,7 @@ steps:
   - label: "Metal.jl"
     plugins:
       - JuliaCI/julia#v1:
-          version: "1.12"
+          version: "1.13"
       - JuliaCI/julia-coverage#v1:
           codecov: true
     command: |
@@ -144,7 +144,7 @@ steps:
   - label: "OpenCL.jl"
     plugins:
       - JuliaCI/julia#v1:
-          version: "1.12"
+          version: "1.13"
       - JuliaCI/julia-coverage#v1:
           codecov: true
     command: |
diff --git a/.github/workflows/GetAsserts.yml b/.github/workflows/GetAsserts.yml
index d06fead8..40bcf88b 100644
--- a/.github/workflows/GetAsserts.yml
+++ b/.github/workflows/GetAsserts.yml
@@ -26,8 +26,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # NOTE: 'master' is currently disabled; keep in sync with TestAsserts
-        version: ['1.12', '1.13']
+        # keep in sync with TestAsserts
+        version: ['1.12', '1.13', 'master']
         build: ['x86_64-linux-gnuassert']
     steps:
       # Only checks out the base branch (never PR code)
diff --git a/.github/workflows/Test.yml b/.github/workflows/Test.yml
index 8c74b012..d109d59c 100644
--- a/.github/workflows/Test.yml
+++ b/.github/workflows/Test.yml
@@ -19,7 +19,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: ['1.10', '1.11', '1.12', '1.13-nightly', 'nightly']
+        version: ['1.10', '1.11', '1.12', '1.13', 'nightly']
         os: [ubuntu-24.04, ubuntu-24.04-arm, macOS-15, windows-2025]
         llvm_args: ['']
         include:
diff --git a/.github/workflows/TestAsserts.yml b/.github/workflows/TestAsserts.yml
index 129e50bd..857a2a0e 100644
--- a/.github/workflows/TestAsserts.yml
+++ b/.github/workflows/TestAsserts.yml
@@ -32,7 +32,7 @@ jobs:
         with:
           script: |
             // Keep in sync with the matrix below
-            const versions = ['1.12', '1.13'];
+            const versions = ['1.12', '1.13', 'master'];
             await Promise.all(versions.map(version =>
               github.rest.checks.create({
                 owner: context.repo.owner,
@@ -55,7 +55,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: ['1.12', '1.13']
+        version: ['1.12', '1.13', 'master']
     steps:
       - name: Download Julia build
         uses: actions/download-artifact@v8
@@ -97,7 +97,7 @@ jobs:
         with:
           script: |
             // Keep in sync with the matrix above
-            const versions = ['1.12', '1.13'];
+            const versions = ['1.12', '1.13', 'master'];
             const jobs = await github.paginate(github.rest.actions.listJobsForWorkflowRunAttempt, {
               owner: context.repo.owner,
               repo: context.repo.repo,
@@ -136,7 +136,7 @@ jobs:
         with:
           script: |
             // Keep in sync with the matrix above
-            const versions = ['1.12', '1.13'];
+            const versions = ['1.12', '1.13', 'master'];
             await Promise.all(versions.map(version =>
               github.rest.checks.create({
                 owner: context.repo.owner,
diff --git a/src/optim.jl b/src/optim.jl
index 3c1d6408..3b01e23d 100644
--- a/src/optim.jl
+++ b/src/optim.jl
@@ -571,9 +571,12 @@ function (self::LowerGCFrame)(fun::LLVM.Function)
         @compiler_assert isempty(uses(alloc_obj)) self.job
     end
 
-    # we don't care about write barriers
-    if haskey(functions(mod), "julia.write_barrier")
-        barrier = functions(mod)["julia.write_barrier"]
+    # we don't care about write barriers. Julia 1.14 replaced `julia.write_barrier` with
+    # object and field-aware variants, the latter specialized on the slot address space.
+    for name in ("julia.write_barrier", "julia.object_write_barrier",
+                 "julia.field_write_barrier.p11", "julia.field_write_barrier.p13")
+        haskey(functions(mod), name) || continue
+        barrier = functions(mod)[name]
 
         for use in uses(barrier)
             call = user(use)::LLVM.CallInst
diff --git a/test/ptx.jl b/test/ptx.jl
index 6f018708..7140d631 100644
--- a/test/ptx.jl
+++ b/test/ptx.jl
@@ -481,6 +481,25 @@ end
         @check_not "gpu_gc_pool_alloc"
         PTX.code_native(mod.ref_kernel, Tuple{Ptr{Int64}, Int})
     end
+
+    # storing a heap object into a field of another one emits a write barrier
+    # (split into object and field-aware variants on Julia 1.14)
+    mod = @eval module $(gensym())
+        mutable struct Outer
+            x::Any
+        end
+
+        function store_field(outer, inner)
+            outer.x = inner
+            nothing
+        end
+    end
+
+    @test @filecheck begin
+        @check_label "define void @{{(julia|j)_store_field_[0-9]+}}"
+        @check_not "write_barrier"
+        PTX.code_llvm(mod.store_field, Tuple{mod.Outer, Base.RefValue{Int}})
+    end
 end
 
 @testset "float boxes" begin